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How big of injectors should i RUN? Help thanks

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Old Mar 2, 2010 | 08:41 AM
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hrs-parker's Avatar
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Default How big of injectors should i RUN? Help thanks

Head
2000 GSR RLZ head
Skunk2 Pro2s
SKunk2 Cam gears
SKunk2 Flat Valves
Skunk2 Dual Valves and Ti Retainers
Ferrea Valve seals, locks, seats, and bronze valve guides
TWM 52mm ITBs
RMF replica headers
ITR lmas

THE BLOCK

Bensen Sleeved 84mm Gsr block
12.5:1 Manley Pistons
Crower Rods
Arp Head studs
Arp Main Studs
Darton Main caps
Moroso Oil Pan
Cometic 84mm .030 head gasket
ACL race bearings(rods,main,thrust)
ITR oil pump
ITR water pump
Oem Main seal

give or take thats the start. I was wondering if 470s are good enough or not? or should i go bigger. trying to sell my 310s and getting bigger ones. PLease lmk what you guys think.

appreciate it!
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Old Mar 2, 2010 | 09:16 AM
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Default Re: How big of injectors should i RUN? Help thanks

ID725's, these might seem big but do some research on them. They have a very good spray pattern over the RC's.
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Old Mar 2, 2010 | 09:19 AM
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Default Re: How big of injectors should i RUN? Help thanks

I might be interested in buying your 310s if you decide to switch them out. LMK.
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Old Mar 2, 2010 | 10:07 AM
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Default Re: How big of injectors should i RUN? Help thanks

RDX injectors look cheap and have a great spray pettern plus oem reliable
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Old Mar 2, 2010 | 10:09 AM
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Default Re: How big of injectors should i RUN? Help thanks

Originally Posted by OH_1fstgsr
ID725's, these might seem big but do some research on them. They have a very good spray pattern over the RC's.
ill research them and see what i can do. thanks
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Old Mar 2, 2010 | 10:10 AM
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Default Re: How big of injectors should i RUN? Help thanks

Originally Posted by GagnarTheUnruly
I might be interested in buying your 310s if you decide to switch them out. LMK.
pmd you

Originally Posted by neverstop
RDX injectors look cheap and have a great spray pettern plus oem reliable
ill look in to them


i was think no more than 550's but ill research some more..thanks guys
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Old Mar 2, 2010 | 05:12 PM
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Default Re: How big of injectors should i RUN? Help thanks

Take a look at this thread.
https://honda-tech.com/forums/all-motor-naturally-aspirated-44/bosch-900cc-injectors-vs-rc-550cc-2687802/

I am starting to plan a similar build as yours. So I'd like see how yours goes.

Early planning
85x87 GSR block
12.5-13:1 compression
GSR head that flows at or very near 300cfm
Victor X CnC'd or a Magnus IM
ID725 injectors
the car will have a street tune on 93 and a race tune on 100
Still in the planning stages

Good luck on your build keep us updated.
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